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net/x25: do not hold the cpu too long in x25_new_lci()
[linux-stable.git] / drivers / net / sb1000.c
blob7820fced33f6286a180b88d9341e2f3e909924c3
1 /* sb1000.c: A General Instruments SB1000 driver for linux. */
2 /*
3 Written 1998 by Franco Venturi.
4
5 Copyright 1998 by Franco Venturi.
6 Copyright 1994,1995 by Donald Becker.
7 Copyright 1993 United States Government as represented by the
8 Director, National Security Agency.
9
10 This driver is for the General Instruments SB1000 (internal SURFboard)
11
12 The author may be reached as fventuri@mediaone.net
13
14 This program is free software; you can redistribute it
15 and/or modify it under the terms of the GNU General
16 Public License as published by the Free Software
17 Foundation; either version 2 of the License, or (at
18 your option) any later version.
19
20 Changes:
21
22 981115 Steven Hirsch <shirsch@adelphia.net>
23
24 Linus changed the timer interface. Should work on all recent
25 development kernels.
26
27 980608 Steven Hirsch <shirsch@adelphia.net>
28
29 Small changes to make it work with 2.1.x kernels. Hopefully,
30 nothing major will change before official release of Linux 2.2.
31
32 Merged with 2.2 - Alan Cox
33 */
34
35 static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)\n";
36
37 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/sched.h>
40 #include <linux/string.h>
41 #include <linux/interrupt.h>
42 #include <linux/errno.h>
43 #include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */
44 #include <linux/in.h>
45 #include <linux/ioport.h>
46 #include <linux/netdevice.h>
47 #include <linux/if_arp.h>
48 #include <linux/skbuff.h>
49 #include <linux/delay.h> /* for udelay() */
50 #include <linux/etherdevice.h>
51 #include <linux/pnp.h>
52 #include <linux/init.h>
53 #include <linux/bitops.h>
54 #include <linux/gfp.h>
55
56 #include <asm/io.h>
57 #include <asm/processor.h>
58 #include <linux/uaccess.h>
59
60 #ifdef SB1000_DEBUG
61 static int sb1000_debug = SB1000_DEBUG;
62 #else
63 static const int sb1000_debug = 1;
64 #endif
65
66 static const int SB1000_IO_EXTENT = 8;
67 /* SB1000 Maximum Receive Unit */
68 static const int SB1000_MRU = 1500; /* octects */
69
70 #define NPIDS 4
71 struct sb1000_private {
72 struct sk_buff *rx_skb[NPIDS];
73 short rx_dlen[NPIDS];
74 unsigned int rx_frames;
75 short rx_error_count;
76 short rx_error_dpc_count;
77 unsigned char rx_session_id[NPIDS];
78 unsigned char rx_frame_id[NPIDS];
79 unsigned char rx_pkt_type[NPIDS];
80 };
81
82 /* prototypes for Linux interface */
83 extern int sb1000_probe(struct net_device *dev);
84 static int sb1000_open(struct net_device *dev);
85 static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
86 static netdev_tx_t sb1000_start_xmit(struct sk_buff *skb,
87 struct net_device *dev);
88 static irqreturn_t sb1000_interrupt(int irq, void *dev_id);
89 static int sb1000_close(struct net_device *dev);
90
91
92 /* SB1000 hardware routines to be used during open/configuration phases */
93 static int card_wait_for_busy_clear(const int ioaddr[],
94 const char* name);
95 static int card_wait_for_ready(const int ioaddr[], const char* name,
96 unsigned char in[]);
97 static int card_send_command(const int ioaddr[], const char* name,
98 const unsigned char out[], unsigned char in[]);
99
100 /* SB1000 hardware routines to be used during frame rx interrupt */
101 static int sb1000_wait_for_ready(const int ioaddr[], const char* name);
102 static int sb1000_wait_for_ready_clear(const int ioaddr[],
103 const char* name);
104 static void sb1000_send_command(const int ioaddr[], const char* name,
105 const unsigned char out[]);
106 static void sb1000_read_status(const int ioaddr[], unsigned char in[]);
107 static void sb1000_issue_read_command(const int ioaddr[],
108 const char* name);
109
110 /* SB1000 commands for open/configuration */
111 static int sb1000_reset(const int ioaddr[], const char* name);
112 static int sb1000_check_CRC(const int ioaddr[], const char* name);
113 static inline int sb1000_start_get_set_command(const int ioaddr[],
114 const char* name);
115 static int sb1000_end_get_set_command(const int ioaddr[],
116 const char* name);
117 static int sb1000_activate(const int ioaddr[], const char* name);
118 static int sb1000_get_firmware_version(const int ioaddr[],
119 const char* name, unsigned char version[], int do_end);
120 static int sb1000_get_frequency(const int ioaddr[], const char* name,
121 int* frequency);
122 static int sb1000_set_frequency(const int ioaddr[], const char* name,
123 int frequency);
124 static int sb1000_get_PIDs(const int ioaddr[], const char* name,
125 short PID[]);
126 static int sb1000_set_PIDs(const int ioaddr[], const char* name,
127 const short PID[]);
128
129 /* SB1000 commands for frame rx interrupt */
130 static int sb1000_rx(struct net_device *dev);
131 static void sb1000_error_dpc(struct net_device *dev);
132
133 static const struct pnp_device_id sb1000_pnp_ids[] = {
134 { "GIC1000", 0 },
135 { "", 0 }
136 };
137 MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids);
138
139 static const struct net_device_ops sb1000_netdev_ops = {
140 .ndo_open = sb1000_open,
141 .ndo_start_xmit = sb1000_start_xmit,
142 .ndo_do_ioctl = sb1000_dev_ioctl,
143 .ndo_stop = sb1000_close,
144 .ndo_set_mac_address = eth_mac_addr,
145 .ndo_validate_addr = eth_validate_addr,
146 };
147
148 static int
149 sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id)
150 {
151 struct net_device *dev;
152 unsigned short ioaddr[2], irq;
153 unsigned int serial_number;
154 int error = -ENODEV;
155
156 if (pnp_device_attach(pdev) < 0)
157 return -ENODEV;
158 if (pnp_activate_dev(pdev) < 0)
159 goto out_detach;
160
161 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1))
162 goto out_disable;
163 if (!pnp_irq_valid(pdev, 0))
164 goto out_disable;
165
166 serial_number = pdev->card->serial;
167
168 ioaddr[0] = pnp_port_start(pdev, 0);
169 ioaddr[1] = pnp_port_start(pdev, 0);
170
171 irq = pnp_irq(pdev, 0);
172
173 if (!request_region(ioaddr[0], 16, "sb1000"))
174 goto out_disable;
175 if (!request_region(ioaddr[1], 16, "sb1000"))
176 goto out_release_region0;
177
178 dev = alloc_etherdev(sizeof(struct sb1000_private));
179 if (!dev) {
180 error = -ENOMEM;
181 goto out_release_regions;
182 }
183
184
185 dev->base_addr = ioaddr[0];
186 /* mem_start holds the second I/O address */
187 dev->mem_start = ioaddr[1];
188 dev->irq = irq;
189
190 if (sb1000_debug > 0)
191 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
192 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
193 dev->mem_start, serial_number, dev->irq);
194
195 /*
196 * The SB1000 is an rx-only cable modem device. The uplink is a modem
197 * and we do not want to arp on it.
198 */
199 dev->flags = IFF_POINTOPOINT|IFF_NOARP;
200
201 SET_NETDEV_DEV(dev, &pdev->dev);
202
203 if (sb1000_debug > 0)
204 printk(KERN_NOTICE "%s", version);
205
206 dev->netdev_ops = &sb1000_netdev_ops;
207
208 /* hardware address is 0:0:serial_number */
209 dev->dev_addr[2] = serial_number >> 24 & 0xff;
210 dev->dev_addr[3] = serial_number >> 16 & 0xff;
211 dev->dev_addr[4] = serial_number >> 8 & 0xff;
212 dev->dev_addr[5] = serial_number >> 0 & 0xff;
213
214 pnp_set_drvdata(pdev, dev);
215
216 error = register_netdev(dev);
217 if (error)
218 goto out_free_netdev;
219 return 0;
220
221 out_free_netdev:
222 free_netdev(dev);
223 out_release_regions:
224 release_region(ioaddr[1], 16);
225 out_release_region0:
226 release_region(ioaddr[0], 16);
227 out_disable:
228 pnp_disable_dev(pdev);
229 out_detach:
230 pnp_device_detach(pdev);
231 return error;
232 }
233
234 static void
235 sb1000_remove_one(struct pnp_dev *pdev)
236 {
237 struct net_device *dev = pnp_get_drvdata(pdev);
238
239 unregister_netdev(dev);
240 release_region(dev->base_addr, 16);
241 release_region(dev->mem_start, 16);
242 free_netdev(dev);
243 }
244
245 static struct pnp_driver sb1000_driver = {
246 .name = "sb1000",
247 .id_table = sb1000_pnp_ids,
248 .probe = sb1000_probe_one,
249 .remove = sb1000_remove_one,
250 };
251
252
253 /*
254 * SB1000 hardware routines to be used during open/configuration phases
255 */
256
257 static const int TimeOutJiffies = (875 * HZ) / 100;
258
259 /* Card Wait For Busy Clear (cannot be used during an interrupt) */
260 static int
261 card_wait_for_busy_clear(const int ioaddr[], const char* name)
262 {
263 unsigned char a;
264 unsigned long timeout;
265
266 a = inb(ioaddr[0] + 7);
267 timeout = jiffies + TimeOutJiffies;
268 while (a & 0x80 || a & 0x40) {
269 /* a little sleep */
270 yield();
271
272 a = inb(ioaddr[0] + 7);
273 if (time_after_eq(jiffies, timeout)) {
274 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
275 name);
276 return -ETIME;
277 }
278 }
279
280 return 0;
281 }
282
283 /* Card Wait For Ready (cannot be used during an interrupt) */
284 static int
285 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
286 {
287 unsigned char a;
288 unsigned long timeout;
289
290 a = inb(ioaddr[1] + 6);
291 timeout = jiffies + TimeOutJiffies;
292 while (a & 0x80 || !(a & 0x40)) {
293 /* a little sleep */
294 yield();
295
296 a = inb(ioaddr[1] + 6);
297 if (time_after_eq(jiffies, timeout)) {
298 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
299 name);
300 return -ETIME;
301 }
302 }
303
304 in[1] = inb(ioaddr[0] + 1);
305 in[2] = inb(ioaddr[0] + 2);
306 in[3] = inb(ioaddr[0] + 3);
307 in[4] = inb(ioaddr[0] + 4);
308 in[0] = inb(ioaddr[0] + 5);
309 in[6] = inb(ioaddr[0] + 6);
310 in[5] = inb(ioaddr[1] + 6);
311 return 0;
312 }
313
314 /* Card Send Command (cannot be used during an interrupt) */
315 static int
316 card_send_command(const int ioaddr[], const char* name,
317 const unsigned char out[], unsigned char in[])
318 {
319 int status, x;
320
321 if ((status = card_wait_for_busy_clear(ioaddr, name)))
322 return status;
323 outb(0xa0, ioaddr[0] + 6);
324 outb(out[2], ioaddr[0] + 1);
325 outb(out[3], ioaddr[0] + 2);
326 outb(out[4], ioaddr[0] + 3);
327 outb(out[5], ioaddr[0] + 4);
328 outb(out[1], ioaddr[0] + 5);
329 outb(0xa0, ioaddr[0] + 6);
330 outb(out[0], ioaddr[0] + 7);
331 if (out[0] != 0x20 && out[0] != 0x30) {
332 if ((status = card_wait_for_ready(ioaddr, name, in)))
333 return status;
334 inb(ioaddr[0] + 7);
335 if (sb1000_debug > 3)
336 printk(KERN_DEBUG "%s: card_send_command "
337 "out: %02x%02x%02x%02x%02x%02x "
338 "in: %02x%02x%02x%02x%02x%02x%02x\n", name,
339 out[0], out[1], out[2], out[3], out[4], out[5],
340 in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
341 } else {
342 if (sb1000_debug > 3)
343 printk(KERN_DEBUG "%s: card_send_command "
344 "out: %02x%02x%02x%02x%02x%02x\n", name,
345 out[0], out[1], out[2], out[3], out[4], out[5]);
346 }
347
348 if (out[1] == 0x1b) {
349 x = (out[2] == 0x02);
350 } else {
351 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
352 return -EIO;
353 }
354 return 0;
355 }
356
357
358 /*
359 * SB1000 hardware routines to be used during frame rx interrupt
360 */
361 static const int Sb1000TimeOutJiffies = 7 * HZ;
362
363 /* Card Wait For Ready (to be used during frame rx) */
364 static int
365 sb1000_wait_for_ready(const int ioaddr[], const char* name)
366 {
367 unsigned long timeout;
368
369 timeout = jiffies + Sb1000TimeOutJiffies;
370 while (inb(ioaddr[1] + 6) & 0x80) {
371 if (time_after_eq(jiffies, timeout)) {
372 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
373 name);
374 return -ETIME;
375 }
376 }
377 timeout = jiffies + Sb1000TimeOutJiffies;
378 while (!(inb(ioaddr[1] + 6) & 0x40)) {
379 if (time_after_eq(jiffies, timeout)) {
380 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
381 name);
382 return -ETIME;
383 }
384 }
385 inb(ioaddr[0] + 7);
386 return 0;
387 }
388
389 /* Card Wait For Ready Clear (to be used during frame rx) */
390 static int
391 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
392 {
393 unsigned long timeout;
394
395 timeout = jiffies + Sb1000TimeOutJiffies;
396 while (inb(ioaddr[1] + 6) & 0x80) {
397 if (time_after_eq(jiffies, timeout)) {
398 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
399 name);
400 return -ETIME;
401 }
402 }
403 timeout = jiffies + Sb1000TimeOutJiffies;
404 while (inb(ioaddr[1] + 6) & 0x40) {
405 if (time_after_eq(jiffies, timeout)) {
406 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
407 name);
408 return -ETIME;
409 }
410 }
411 return 0;
412 }
413
414 /* Card Send Command (to be used during frame rx) */
415 static void
416 sb1000_send_command(const int ioaddr[], const char* name,
417 const unsigned char out[])
418 {
419 outb(out[2], ioaddr[0] + 1);
420 outb(out[3], ioaddr[0] + 2);
421 outb(out[4], ioaddr[0] + 3);
422 outb(out[5], ioaddr[0] + 4);
423 outb(out[1], ioaddr[0] + 5);
424 outb(out[0], ioaddr[0] + 7);
425 if (sb1000_debug > 3)
426 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
427 "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]);
428 }
429
430 /* Card Read Status (to be used during frame rx) */
431 static void
432 sb1000_read_status(const int ioaddr[], unsigned char in[])
433 {
434 in[1] = inb(ioaddr[0] + 1);
435 in[2] = inb(ioaddr[0] + 2);
436 in[3] = inb(ioaddr[0] + 3);
437 in[4] = inb(ioaddr[0] + 4);
438 in[0] = inb(ioaddr[0] + 5);
439 }
440
441 /* Issue Read Command (to be used during frame rx) */
442 static void
443 sb1000_issue_read_command(const int ioaddr[], const char* name)
444 {
445 static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
446
447 sb1000_wait_for_ready_clear(ioaddr, name);
448 outb(0xa0, ioaddr[0] + 6);
449 sb1000_send_command(ioaddr, name, Command0);
450 }
451
452
453 /*
454 * SB1000 commands for open/configuration
455 */
456 /* reset SB1000 card */
457 static int
458 sb1000_reset(const int ioaddr[], const char* name)
459 {
460 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
461
462 unsigned char st[7];
463 int port, status;
464
465 port = ioaddr[1] + 6;
466 outb(0x4, port);
467 inb(port);
468 udelay(1000);
469 outb(0x0, port);
470 inb(port);
471 ssleep(1);
472 outb(0x4, port);
473 inb(port);
474 udelay(1000);
475 outb(0x0, port);
476 inb(port);
477 udelay(0);
478
479 if ((status = card_send_command(ioaddr, name, Command0, st)))
480 return status;
481 if (st[3] != 0xf0)
482 return -EIO;
483 return 0;
484 }
485
486 /* check SB1000 firmware CRC */
487 static int
488 sb1000_check_CRC(const int ioaddr[], const char* name)
489 {
490 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
491
492 unsigned char st[7];
493 int crc, status;
494
495 /* check CRC */
496 if ((status = card_send_command(ioaddr, name, Command0, st)))
497 return status;
498 if (st[1] != st[3] || st[2] != st[4])
499 return -EIO;
500 crc = st[1] << 8 | st[2];
501 return 0;
502 }
503
504 static inline int
505 sb1000_start_get_set_command(const int ioaddr[], const char* name)
506 {
507 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
508
509 unsigned char st[7];
510
511 return card_send_command(ioaddr, name, Command0, st);
512 }
513
514 static int
515 sb1000_end_get_set_command(const int ioaddr[], const char* name)
516 {
517 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
518 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
519
520 unsigned char st[7];
521 int status;
522
523 if ((status = card_send_command(ioaddr, name, Command0, st)))
524 return status;
525 return card_send_command(ioaddr, name, Command1, st);
526 }
527
528 static int
529 sb1000_activate(const int ioaddr[], const char* name)
530 {
531 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
532 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
533
534 unsigned char st[7];
535 int status;
536
537 ssleep(1);
538 if ((status = card_send_command(ioaddr, name, Command0, st)))
539 return status;
540 if ((status = card_send_command(ioaddr, name, Command1, st)))
541 return status;
542 if (st[3] != 0xf1) {
543 if ((status = sb1000_start_get_set_command(ioaddr, name)))
544 return status;
545 return -EIO;
546 }
547 udelay(1000);
548 return sb1000_start_get_set_command(ioaddr, name);
549 }
550
551 /* get SB1000 firmware version */
552 static int
553 sb1000_get_firmware_version(const int ioaddr[], const char* name,
554 unsigned char version[], int do_end)
555 {
556 static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
557
558 unsigned char st[7];
559 int status;
560
561 if ((status = sb1000_start_get_set_command(ioaddr, name)))
562 return status;
563 if ((status = card_send_command(ioaddr, name, Command0, st)))
564 return status;
565 if (st[0] != 0xa3)
566 return -EIO;
567 version[0] = st[1];
568 version[1] = st[2];
569 if (do_end)
570 return sb1000_end_get_set_command(ioaddr, name);
571 else
572 return 0;
573 }
574
575 /* get SB1000 frequency */
576 static int
577 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
578 {
579 static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
580
581 unsigned char st[7];
582 int status;
583
584 udelay(1000);
585 if ((status = sb1000_start_get_set_command(ioaddr, name)))
586 return status;
587 if ((status = card_send_command(ioaddr, name, Command0, st)))
588 return status;
589 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
590 return sb1000_end_get_set_command(ioaddr, name);
591 }
592
593 /* set SB1000 frequency */
594 static int
595 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
596 {
597 unsigned char st[7];
598 int status;
599 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
600
601 const int FrequencyLowerLimit = 57000;
602 const int FrequencyUpperLimit = 804000;
603
604 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
605 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
606 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit,
607 FrequencyUpperLimit);
608 return -EINVAL;
609 }
610 udelay(1000);
611 if ((status = sb1000_start_get_set_command(ioaddr, name)))
612 return status;
613 Command0[5] = frequency & 0xff;
614 frequency >>= 8;
615 Command0[4] = frequency & 0xff;
616 frequency >>= 8;
617 Command0[3] = frequency & 0xff;
618 frequency >>= 8;
619 Command0[2] = frequency & 0xff;
620 return card_send_command(ioaddr, name, Command0, st);
621 }
622
623 /* get SB1000 PIDs */
624 static int
625 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
626 {
627 static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
628 static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
629 static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
630 static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
631
632 unsigned char st[7];
633 int status;
634
635 udelay(1000);
636 if ((status = sb1000_start_get_set_command(ioaddr, name)))
637 return status;
638
639 if ((status = card_send_command(ioaddr, name, Command0, st)))
640 return status;
641 PID[0] = st[1] << 8 | st[2];
642
643 if ((status = card_send_command(ioaddr, name, Command1, st)))
644 return status;
645 PID[1] = st[1] << 8 | st[2];
646
647 if ((status = card_send_command(ioaddr, name, Command2, st)))
648 return status;
649 PID[2] = st[1] << 8 | st[2];
650
651 if ((status = card_send_command(ioaddr, name, Command3, st)))
652 return status;
653 PID[3] = st[1] << 8 | st[2];
654
655 return sb1000_end_get_set_command(ioaddr, name);
656 }
657
658 /* set SB1000 PIDs */
659 static int
660 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
661 {
662 static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
663
664 unsigned char st[7];
665 short p;
666 int status;
667 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
668 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
669 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
670 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
671
672 udelay(1000);
673 if ((status = sb1000_start_get_set_command(ioaddr, name)))
674 return status;
675
676 p = PID[0];
677 Command0[3] = p & 0xff;
678 p >>= 8;
679 Command0[2] = p & 0xff;
680 if ((status = card_send_command(ioaddr, name, Command0, st)))
681 return status;
682
683 p = PID[1];
684 Command1[3] = p & 0xff;
685 p >>= 8;
686 Command1[2] = p & 0xff;
687 if ((status = card_send_command(ioaddr, name, Command1, st)))
688 return status;
689
690 p = PID[2];
691 Command2[3] = p & 0xff;
692 p >>= 8;
693 Command2[2] = p & 0xff;
694 if ((status = card_send_command(ioaddr, name, Command2, st)))
695 return status;
696
697 p = PID[3];
698 Command3[3] = p & 0xff;
699 p >>= 8;
700 Command3[2] = p & 0xff;
701 if ((status = card_send_command(ioaddr, name, Command3, st)))
702 return status;
703
704 if ((status = card_send_command(ioaddr, name, Command4, st)))
705 return status;
706 return sb1000_end_get_set_command(ioaddr, name);
707 }
708
709
710 static void
711 sb1000_print_status_buffer(const char* name, unsigned char st[],
712 unsigned char buffer[], int size)
713 {
714 int i, j, k;
715
716 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]);
717 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
718 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
719 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29],
720 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
721 buffer[46] << 8 | buffer[47],
722 buffer[42], buffer[43], buffer[44], buffer[45],
723 buffer[48] << 8 | buffer[49]);
724 } else {
725 for (i = 0, k = 0; i < (size + 7) / 8; i++) {
726 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:");
727 for (j = 0; j < 8 && k < size; j++, k++)
728 printk(" %02x", buffer[k]);
729 printk("\n");
730 }
731 }
732 }
733
734 /*
735 * SB1000 commands for frame rx interrupt
736 */
737 /* receive a single frame and assemble datagram
738 * (this is the heart of the interrupt routine)
739 */
740 static int
741 sb1000_rx(struct net_device *dev)
742 {
743
744 #define FRAMESIZE 184
745 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
746 short dlen;
747 int ioaddr, ns;
748 unsigned int skbsize;
749 struct sk_buff *skb;
750 struct sb1000_private *lp = netdev_priv(dev);
751 struct net_device_stats *stats = &dev->stats;
752
753 /* SB1000 frame constants */
754 const int FrameSize = FRAMESIZE;
755 const int NewDatagramHeaderSkip = 8;
756 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18;
757 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize;
758 const int ContDatagramHeaderSkip = 7;
759 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1;
760 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize;
761 const int TrailerSize = 4;
762
763 ioaddr = dev->base_addr;
764
765 insw(ioaddr, (unsigned short*) st, 1);
766 #ifdef XXXDEBUG
767 printk("cm0: received: %02x %02x\n", st[0], st[1]);
768 #endif /* XXXDEBUG */
769 lp->rx_frames++;
770
771 /* decide if it is a good or bad frame */
772 for (ns = 0; ns < NPIDS; ns++) {
773 session_id = lp->rx_session_id[ns];
774 frame_id = lp->rx_frame_id[ns];
775 if (st[0] == session_id) {
776 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) {
777 goto good_frame;
778 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
779 goto skipped_frame;
780 } else {
781 goto bad_frame;
782 }
783 } else if (st[0] == (session_id | 0x40)) {
784 if ((st[1] & 0xf0) == 0x30) {
785 goto skipped_frame;
786 } else {
787 goto bad_frame;
788 }
789 }
790 }
791 goto bad_frame;
792
793 skipped_frame:
794 stats->rx_frame_errors++;
795 skb = lp->rx_skb[ns];
796 if (sb1000_debug > 1)
797 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x "
798 "expecting %02x %02x\n", dev->name, st[0], st[1],
799 skb ? session_id : session_id | 0x40, frame_id);
800 if (skb) {
801 dev_kfree_skb(skb);
802 skb = NULL;
803 }
804
805 good_frame:
806 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
807 /* new datagram */
808 if (st[0] & 0x40) {
809 /* get data length */
810 insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
811 #ifdef XXXDEBUG
812 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]);
813 #endif /* XXXDEBUG */
814 if (buffer[0] != NewDatagramHeaderSkip) {
815 if (sb1000_debug > 1)
816 printk(KERN_WARNING "%s: new datagram header skip error: "
817 "got %02x expecting %02x\n", dev->name, buffer[0],
818 NewDatagramHeaderSkip);
819 stats->rx_length_errors++;
820 insw(ioaddr, buffer, NewDatagramDataSize / 2);
821 goto bad_frame_next;
822 }
823 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 |
824 buffer[NewDatagramHeaderSkip + 4]) - 17;
825 if (dlen > SB1000_MRU) {
826 if (sb1000_debug > 1)
827 printk(KERN_WARNING "%s: datagram length (%d) greater "
828 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU);
829 stats->rx_length_errors++;
830 insw(ioaddr, buffer, NewDatagramDataSize / 2);
831 goto bad_frame_next;
832 }
833 lp->rx_dlen[ns] = dlen;
834 /* compute size to allocate for datagram */
835 skbsize = dlen + FrameSize;
836 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) {
837 if (sb1000_debug > 1)
838 printk(KERN_WARNING "%s: can't allocate %d bytes long "
839 "skbuff\n", dev->name, skbsize);
840 stats->rx_dropped++;
841 insw(ioaddr, buffer, NewDatagramDataSize / 2);
842 goto dropped_frame;
843 }
844 skb->dev = dev;
845 skb_reset_mac_header(skb);
846 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16];
847 insw(ioaddr, skb_put(skb, NewDatagramDataSize),
848 NewDatagramDataSize / 2);
849 lp->rx_skb[ns] = skb;
850 } else {
851 /* continuation of previous datagram */
852 insw(ioaddr, buffer, ContDatagramHeaderSize / 2);
853 if (buffer[0] != ContDatagramHeaderSkip) {
854 if (sb1000_debug > 1)
855 printk(KERN_WARNING "%s: cont datagram header skip error: "
856 "got %02x expecting %02x\n", dev->name, buffer[0],
857 ContDatagramHeaderSkip);
858 stats->rx_length_errors++;
859 insw(ioaddr, buffer, ContDatagramDataSize / 2);
860 goto bad_frame_next;
861 }
862 skb = lp->rx_skb[ns];
863 insw(ioaddr, skb_put(skb, ContDatagramDataSize),
864 ContDatagramDataSize / 2);
865 dlen = lp->rx_dlen[ns];
866 }
867 if (skb->len < dlen + TrailerSize) {
868 lp->rx_session_id[ns] &= ~0x40;
869 return 0;
870 }
871
872 /* datagram completed: send to upper level */
873 skb_trim(skb, dlen);
874 netif_rx(skb);
875 stats->rx_bytes+=dlen;
876 stats->rx_packets++;
877 lp->rx_skb[ns] = NULL;
878 lp->rx_session_id[ns] |= 0x40;
879 return 0;
880
881 bad_frame:
882 insw(ioaddr, buffer, FrameSize / 2);
883 if (sb1000_debug > 1)
884 printk(KERN_WARNING "%s: frame error: got %02x %02x\n",
885 dev->name, st[0], st[1]);
886 stats->rx_frame_errors++;
887 bad_frame_next:
888 if (sb1000_debug > 2)
889 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
890 dropped_frame:
891 stats->rx_errors++;
892 if (ns < NPIDS) {
893 if ((skb = lp->rx_skb[ns])) {
894 dev_kfree_skb(skb);
895 lp->rx_skb[ns] = NULL;
896 }
897 lp->rx_session_id[ns] |= 0x40;
898 }
899 return -1;
900 }
901
902 static void
903 sb1000_error_dpc(struct net_device *dev)
904 {
905 static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
906
907 char *name;
908 unsigned char st[5];
909 int ioaddr[2];
910 struct sb1000_private *lp = netdev_priv(dev);
911 const int ErrorDpcCounterInitialize = 200;
912
913 ioaddr[0] = dev->base_addr;
914 /* mem_start holds the second I/O address */
915 ioaddr[1] = dev->mem_start;
916 name = dev->name;
917
918 sb1000_wait_for_ready_clear(ioaddr, name);
919 sb1000_send_command(ioaddr, name, Command0);
920 sb1000_wait_for_ready(ioaddr, name);
921 sb1000_read_status(ioaddr, st);
922 if (st[1] & 0x10)
923 lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
924 }
925
926
927 /*
928 * Linux interface functions
929 */
930 static int
931 sb1000_open(struct net_device *dev)
932 {
933 char *name;
934 int ioaddr[2], status;
935 struct sb1000_private *lp = netdev_priv(dev);
936 const unsigned short FirmwareVersion[] = {0x01, 0x01};
937
938 ioaddr[0] = dev->base_addr;
939 /* mem_start holds the second I/O address */
940 ioaddr[1] = dev->mem_start;
941 name = dev->name;
942
943 /* initialize sb1000 */
944 if ((status = sb1000_reset(ioaddr, name)))
945 return status;
946 ssleep(1);
947 if ((status = sb1000_check_CRC(ioaddr, name)))
948 return status;
949
950 /* initialize private data before board can catch interrupts */
951 lp->rx_skb[0] = NULL;
952 lp->rx_skb[1] = NULL;
953 lp->rx_skb[2] = NULL;
954 lp->rx_skb[3] = NULL;
955 lp->rx_dlen[0] = 0;
956 lp->rx_dlen[1] = 0;
957 lp->rx_dlen[2] = 0;
958 lp->rx_dlen[3] = 0;
959 lp->rx_frames = 0;
960 lp->rx_error_count = 0;
961 lp->rx_error_dpc_count = 0;
962 lp->rx_session_id[0] = 0x50;
963 lp->rx_session_id[1] = 0x48;
964 lp->rx_session_id[2] = 0x44;
965 lp->rx_session_id[3] = 0x42;
966 lp->rx_frame_id[0] = 0;
967 lp->rx_frame_id[1] = 0;
968 lp->rx_frame_id[2] = 0;
969 lp->rx_frame_id[3] = 0;
970 if (request_irq(dev->irq, sb1000_interrupt, 0, "sb1000", dev)) {
971 return -EAGAIN;
972 }
973
974 if (sb1000_debug > 2)
975 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
976
977 /* Activate board and check firmware version */
978 udelay(1000);
979 if ((status = sb1000_activate(ioaddr, name)))
980 return status;
981 udelay(0);
982 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
983 return status;
984 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
985 printk(KERN_WARNING "%s: found firmware version %x.%02x "
986 "(should be %x.%02x)\n", name, version[0], version[1],
987 FirmwareVersion[0], FirmwareVersion[1]);
988
989
990 netif_start_queue(dev);
991 return 0; /* Always succeed */
992 }
993
994 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
995 {
996 char* name;
997 unsigned char version[2];
998 short PID[4];
999 int ioaddr[2], status, frequency;
1000 unsigned int stats[5];
1001 struct sb1000_private *lp = netdev_priv(dev);
1002
1003 if (!(dev && dev->flags & IFF_UP))
1004 return -ENODEV;
1005
1006 ioaddr[0] = dev->base_addr;
1007 /* mem_start holds the second I/O address */
1008 ioaddr[1] = dev->mem_start;
1009 name = dev->name;
1010
1011 switch (cmd) {
1012 case SIOCGCMSTATS: /* get statistics */
1013 stats[0] = dev->stats.rx_bytes;
1014 stats[1] = lp->rx_frames;
1015 stats[2] = dev->stats.rx_packets;
1016 stats[3] = dev->stats.rx_errors;
1017 stats[4] = dev->stats.rx_dropped;
1018 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
1019 return -EFAULT;
1020 status = 0;
1021 break;
1022
1023 case SIOCGCMFIRMWARE: /* get firmware version */
1024 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1025 return status;
1026 if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
1027 return -EFAULT;
1028 break;
1029
1030 case SIOCGCMFREQUENCY: /* get frequency */
1031 if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1032 return status;
1033 if(put_user(frequency, (int __user *) ifr->ifr_data))
1034 return -EFAULT;
1035 break;
1036
1037 case SIOCSCMFREQUENCY: /* set frequency */
1038 if (!capable(CAP_NET_ADMIN))
1039 return -EPERM;
1040 if(get_user(frequency, (int __user *) ifr->ifr_data))
1041 return -EFAULT;
1042 if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1043 return status;
1044 break;
1045
1046 case SIOCGCMPIDS: /* get PIDs */
1047 if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1048 return status;
1049 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
1050 return -EFAULT;
1051 break;
1052
1053 case SIOCSCMPIDS: /* set PIDs */
1054 if (!capable(CAP_NET_ADMIN))
1055 return -EPERM;
1056 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
1057 return -EFAULT;
1058 if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
1059 return status;
1060 /* set session_id, frame_id and pkt_type too */
1061 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
1062 lp->rx_session_id[1] = 0x48;
1063 lp->rx_session_id[2] = 0x44;
1064 lp->rx_session_id[3] = 0x42;
1065 lp->rx_frame_id[0] = 0;
1066 lp->rx_frame_id[1] = 0;
1067 lp->rx_frame_id[2] = 0;
1068 lp->rx_frame_id[3] = 0;
1069 break;
1070
1071 default:
1072 status = -EINVAL;
1073 break;
1074 }
1075 return status;
1076 }
1077
1078 /* transmit function: do nothing since SB1000 can't send anything out */
1079 static netdev_tx_t
1080 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1081 {
1082 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1083 /* sb1000 can't xmit datagrams */
1084 dev_kfree_skb(skb);
1085 return NETDEV_TX_OK;
1086 }
1087
1088 /* SB1000 interrupt handler. */
1089 static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
1090 {
1091 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
1092 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
1093
1094 char *name;
1095 unsigned char st;
1096 int ioaddr[2];
1097 struct net_device *dev = dev_id;
1098 struct sb1000_private *lp = netdev_priv(dev);
1099
1100 const int MaxRxErrorCount = 6;
1101
1102 ioaddr[0] = dev->base_addr;
1103 /* mem_start holds the second I/O address */
1104 ioaddr[1] = dev->mem_start;
1105 name = dev->name;
1106
1107 /* is it a good interrupt? */
1108 st = inb(ioaddr[1] + 6);
1109 if (!(st & 0x08 && st & 0x20)) {
1110 return IRQ_NONE;
1111 }
1112
1113 if (sb1000_debug > 3)
1114 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1115
1116 st = inb(ioaddr[0] + 7);
1117 if (sb1000_rx(dev))
1118 lp->rx_error_count++;
1119 #ifdef SB1000_DELAY
1120 udelay(SB1000_DELAY);
1121 #endif /* SB1000_DELAY */
1122 sb1000_issue_read_command(ioaddr, name);
1123 if (st & 0x01) {
1124 sb1000_error_dpc(dev);
1125 sb1000_issue_read_command(ioaddr, name);
1126 }
1127 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
1128 sb1000_wait_for_ready_clear(ioaddr, name);
1129 sb1000_send_command(ioaddr, name, Command0);
1130 sb1000_wait_for_ready(ioaddr, name);
1131 sb1000_issue_read_command(ioaddr, name);
1132 }
1133 if (lp->rx_error_count >= MaxRxErrorCount) {
1134 sb1000_wait_for_ready_clear(ioaddr, name);
1135 sb1000_send_command(ioaddr, name, Command1);
1136 sb1000_wait_for_ready(ioaddr, name);
1137 sb1000_issue_read_command(ioaddr, name);
1138 lp->rx_error_count = 0;
1139 }
1140
1141 return IRQ_HANDLED;
1142 }
1143
1144 static int sb1000_close(struct net_device *dev)
1145 {
1146 int i;
1147 int ioaddr[2];
1148 struct sb1000_private *lp = netdev_priv(dev);
1149
1150 if (sb1000_debug > 2)
1151 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1152
1153 netif_stop_queue(dev);
1154
1155 ioaddr[0] = dev->base_addr;
1156 /* mem_start holds the second I/O address */
1157 ioaddr[1] = dev->mem_start;
1158
1159 free_irq(dev->irq, dev);
1160 /* If we don't do this, we can't re-insmod it later. */
1161 release_region(ioaddr[1], SB1000_IO_EXTENT);
1162 release_region(ioaddr[0], SB1000_IO_EXTENT);
1163
1164 /* free rx_skb's if needed */
1165 for (i=0; i<4; i++) {
1166 if (lp->rx_skb[i]) {
1167 dev_kfree_skb(lp->rx_skb[i]);
1168 }
1169 }
1170 return 0;
1171 }
1172
1173 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
1174 MODULE_DESCRIPTION("General Instruments SB1000 driver");
1175 MODULE_LICENSE("GPL");
1176
1177 module_pnp_driver(sb1000_driver);
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